Exact solutions of Kondo problems in higher-order fermions
Exact solutions of Kondo problems in higher-order fermions
复制标题
高阶费米子中近藤问题的精确解
DOI:
10.1103/physrevb.105.024416
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发表时间:
2022-01
影响因子:
3.7
通讯作者:
Baigeng Wang
中科院分区:
文献类型:
--
作者:
Peng Song;Haodang Ma;Rui Wang;Baigeng Wang
The conformal field theory (CFT) approach to Kondo problems, originally developed by Affleck and Ludwig (AL), has greatly advanced the fundamental knowledge of Kondo physics. The CFT approach to Kondo impurities is based on a necessary approximation, i.e., the linearization of the low-lying excitations in a narrow energy window about the Fermi surface. This treatment works well in normal metal baths, but encounters fundamental difficulties in systems with Fermi points and high-order dispersion relations. Prominent examples of such systems are the recently-proposed topological semimetals with emergent higher-order fermions. Here, we develop a new CFT technique that yields exact solutions to the Kondo problems in higher-order fermion systems. Our approach does not require any linearization of the low-lying excitations, and more importantly, it rigorously bosonizes the entire energy spectrum of the higher-order fermions. Therefore, it provides a more solid theoretical base for evaluating the thermodynamic quantities at finite temperatures. Our work significantly broadens the scope of CFT techniques and brings about unprecedented applications beyond the reach of conventional methods.
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影响因子:
2.1
作者:
S. Huang;J. Mayerle;R. Greene;Maw‐Kuen Wu;C. Chu
通讯作者:
S. Huang;J. Mayerle;R. Greene;Maw‐Kuen Wu;C. Chu
影响因子:
16.6
作者:
Yang, Bohm-Jung;Nagaosa, Naoto
通讯作者:
Nagaosa, Naoto
影响因子:
2.1
作者:
J. C. Armici;M. Decroux;O. Fischer;M. Potel;R. Chevrel;M. Sergent
通讯作者:
J. C. Armici;M. Decroux;O. Fischer;M. Potel;R. Chevrel;M. Sergent
DOI:
--
发表时间:
1995
期刊:
--
影响因子:
--
作者:
J. Delft
通讯作者:
J. Delft
影响因子:
2.8
作者:
P. Hor;R. Meng;C. Chu;J. Tarascon;Maw‐Kuen Wu
通讯作者:
P. Hor;R. Meng;C. Chu;J. Tarascon;Maw‐Kuen Wu